PeteHall said:This has brought back happy memories.
I remember spending hours playing in the drains at Tintern Abbey as a child. I seem to remember one of them emerging in the bank high above the river, though that may have grown in my imagination.
Last time I visited, as a teenager, I think that they were all fenced off or covered with gratings so that you couldn't get in...
royfellows said:At Goginan, Ceredigion, they put a pole down through the cut and cover deep adit. Still there as it was installed. A few years ago an explorer with a bit of nerve managed to squeeze past it but encountered a blockage about 40 yards beyond.